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4) In my classes F is first defined loosely as a
measurable push or pull of any kind.
This is good enough to solve static equilibrium problems.
Later
Fnet becomes "the cause of an acceleration." Is using
the concept of force also a blunder?
In going "from
known to unknown" should we teach force before energy,
or the other way around?
Should ALL mechanical problems be solved by energy
approaches because energy is "more basic" than F?
Why not?
I am ready to accept this kind of physics,